How to Grow Green Onion Evergreen
Wikimedia Commons
Green Onion Evergreen
Allium fistulosum
vegetableGreen Onion Evergreen is a hardy, perennial bunching onion variety that produces slender, tender green shoots year-round in mild climates. Known for its exceptional cold hardiness and ability to regrow after cutting, it's an excellent choice for continuous harvesting. The plant develops small white flowers if left unharvested, but is primarily grown for its edible green foliage.
Looking for a specific variety?
When should you plant Green Onion Evergreen in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Green Onion Evergreen timeline · Pittsburgh, PA (Zone 6b)
-
Plant Green Onion Evergreen
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Green Onion Evergreen
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Green Onion Evergreen dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; exceptionally cold-hardy, can overwinter even in zone 3
Sign up free to see if Green Onion Evergreen grows in your zone — and get a personalized planting timeline.
Get my Green Onion Evergreen timeline →Growth Stages
Seedling
10-14 daysThin, grass-like shoots emerge from soil; 2-3 true leaves develop within 1-2 weeks
Keep soil evenly moist. Thin seedlings to 4 inches apart. Provide bright light. Avoid overwatering to prevent damping off.
Vegetative Growth
15-30 days to first harvestMultiple shoots develop from a central clump, growing upright and slender; foliage is bright green and tender
Maintain consistent moisture and fertilize every 2-3 weeks with balanced fertilizer or dilute fish emulsion. Remove any flower buds if continuous leaf production is desired. Mulch around base.
Pre-Harvest Maturity
When plants are 6+ inches tallShoots reach 6-10 inches tall with full color and flavor development; clusters form dense, upright bunches
Ensure consistent watering and adequate light. Check for pests like thrips or onion maggots. Continue fertilizing every 2-3 weeks.
Harvesting & Regrowth
Ongoing through seasonCut shoots are removed at soil level; plant regrows from underground bulbs and nodes within 2-3 weeks for repeated harvests
Harvest outer leaves first, or cut entire plant 1-2 inches above soil level. Water and fertilize after cutting to encourage regrowth. Successive plantings ensure year-round supply.
Dormancy (Cold Zones)
4-6 months in cold climatesIn zones 3-5, foliage dies back in winter but underground bulbs survive to regrow in spring
Mulch heavily (4-6 inches) after first frost to protect bulbs. Remove mulch in early spring. Plant remains dormant but viable for spring regrowth.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with neem oil or insecticidal soap every 7-10 days. Remove heavily infested foliage. Encourage beneficial insects like ladybugs.
-
Use row covers on young plants. Apply diatomaceous earth around base. Remove and destroy infested plants. Rotate crop location yearly.
-
Remove infested leaves promptly. Use floating row covers. Spray with spinosad if infestation is severe.
-
Spray with strong water stream to dislodge. Apply neem oil or insecticidal soap. Encourage natural predators.
-
Ensure excellent drainage. Avoid overhead watering. Remove infected plants immediately. Rotate crop location; do not replant alliums in same spot for 3-4 years.
Uses
Fresh Garnish & Salads
CulinaryGreen Onion Evergreen's tender shoots add a mild, onion flavor to salads, soups, and cold dishes. The entire green portion is edible raw. [source]
Cooked Dishes & Seasoning
CulinaryUse in stir-fries, grain bowls, Asian noodle dishes, omelets, and baked potatoes for a fresh onion accent. Heat mellows the flavor slightly. [source]
Anti-inflammatory & Digestive Support
MedicinalTraditional use in herbal medicine; contains quercetin and vitamin C which support immune function and may help with digestion. [source]
Year-Round Continuous Harvest
HouseholdPerennial in many climates, Green Onion Evergreen provides fresh greens throughout the year with minimal effort, making it ideal for kitchen gardens. [source]
Pollinator Attraction
WildlifeWhen allowed to flower, the small white blooms attract bees and beneficial insects to the garden ecosystem. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting when shoots reach 6-8 inches tall (typically 30-45 days after planting). Harvest outer leaves first by cutting at soil level with scissors or knife, or remove entire plant and allow regrowth. Multiple harvests are possible—typically harvest every 2-4 weeks. For tender, mild flavor, harvest younger, smaller shoots. Evergreen is hardy and will regrow vigorously if not harvested too severely. In spring, cut back any dead winter foliage before new growth emerges.
Fun Facts
- 🌱 Green Onion Evergreen earned its 'Evergreen' name because it remains productive and leafy throughout the year in many temperate climates, including during light snow in zone 3 and above.
- 🌱 Unlike true onions, bunching onions like Evergreen do not form large bulbs; instead, they multiply by developing underground offsets, making them perennial and capable of being divided and transplanted.
- 🌱 A single planting can produce for 3-5+ years if properly maintained, making it one of the most economical perennial vegetables for home gardeners.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Green Onion Evergreen planting timeline
Tell us your zip code and we'll calculate exactly when to start Green Onion Evergreen seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Green Onion Evergreen timeline →